Barles s



CHARLES sfLoeKWooD, 0FNEWBRG1 NEW YORK.

amers Patent No. 81,385, dated August 25, 186s.

IMPROVEMENT INQDERRIGK.

ith Stimuli referat tu in these lttters nteut mit uniting nrt nt tige sume.

TO ALL WHOM ITMAY CONCERN-'z Beit known thatLOHAuLES S. LOGKWOOD, of Newburg, in the county of Orange, and .State of New York, have nventeda new und useful Mode of Balancing the Weight of the .Bucket on Derricks; and I do hereby declarethat the following is a full, clear, and v`exact description of the same, reference being had to the annexed drawings, and to the letters of reference marked thereon.

The nature of my invention consists of attaching to the rope or chain, by which the bucket is pulled up for hoisting substances, l'another rope or chain, and to 'this a weight, in such a way that this weight is moving down' whcn'the" bucket, laden with itsfreight, is pulled up, in this way helping` to lift the bucket, and the weight is movingup when lthe empty bucket is lowered down again. It will be seen Vthat the bucket can only be balanced to such a degree that a sufficient weight is left on the side of the bucket for` it to go down by its ovm weight, with suiricientvelocity to overcome the friction in the different blocks and falls used for the transportutien of rope or chain in their different directions. l

The counterweight is attached to an axle with two wheels, which roll on a nearly vertical pla-ne. This plane, near its upper terminus, is breken to uv nearly1 horizontal plane, on which these wheels are moving when the bucket is down. In this way the rope, to which the counter-weight is attached, is slackened, and does not .pull so strong on the rope with the bucket, `enabling the empty bucket to be unhooked, and another full bucket to be attached to the hook on'the rope.

When the. bucket is up, the weight is down, and may rest on the ground or hang suspended on the rope, as in most cases the bucket need not be unhooked, but only emptied into awheel-barrow or car, or some other vessel ready to receive the freight.` It is necessary to have the rope; which keeps the balance-weight, adjustable in length, in case the derrick is used for unloading a. vessel or'boat, which is exposed to high or low water during unloading, as the weight is to :come on the upper plane at the 4moment the empty bucket comes to the ground or on the bottom, to enable the attending person to unhook the empty bucket.

' The benet of working or unloading a boat or vesselwith balanced bucket is apparent. Suppose the weight of the bucket tobc two hundred pounds, which is a low estimate, one hundred and fifty pounds, at least, could be balanced, as liitypounds will be suiieient to pull the bucket down with suicient' velocity. These one hundred and lift-y pounds could be taken olvfrom the horse., who has to pull the bucket up, making,

.for about seven hundred times per day, fifty-two tons,or an equal amount of freight lcould be hoisted up each time, making fifty-two tons 'weight per day more hoisted up by the same power as before without balanced bucket.

Figure l shows a derriek in operation, with the bucket up.

`A A is the mast, B the gib, G the bucket, C' the hook, and a a u thc rope by which the bucket is pulled up, going over the different rollers 'D and Gr, the pulling power being attached at H.

At U, above thehook C', is attached the rope bb I), leading over the rollers EON, and is fastened on a hook, K, on thegib, where its length can be regulated by hooking any one of the links ot' the chain over the hook K, on the gib.

This regulating may be done by any other convenient means, amounting to the same, tothe shortening or lengthening of the rope, to which the counter-weight Q is attached.

Q is the counter-weight on the axlehLwith rollers P I. 'lhcse rollers move up and down on the ways RR'R, the upper ends of which, Rl R2, run nearly horizontal, and rest on the mast, about 'one footbelow the lower end ofgthe gib'B. i

By this arrangement of suspending the weight on a full, the way of the weight Q is only one-half of the bucket. I It must therefore be double as heavy to eounteibalance the necessaryweight to bebalanccd. If the bucket is two hundred pounds, and fifty pounds necessary to move down the'bueket, the counterbalance must be three hundred pounds'. i

'.l-T show a platform, nithvrails, and a trucker cation it, to receive the hoisted-up freight. L L show a piece of chau attached to thc rope bb,which serves to adjust the length of rope fo)` the counter-weight for high or low water, or for a. full and empty or nearly empty vessel.

What I claim as my invention, and des're to secure by Letters Patent, is-

The counter-weight to balance the bucket on a. d'errick, in the wey as shown and described, an'd for the purpose as specified.

CHARLES S. LOCKWOOD.

Witnesses:

JAS. II. YOUNG, FRANCIS SCOTT. 

